Play & Charge Kit | £5 | Game | Xbox 360

Spare battery packs are always handy for your 360 controllers. With one of these you don't have to worry about individual rechargeable batteries. Instead, just slot the pack in and charge while you play if you want thanks to the lengthy cable. This is Game's own-brand rather than an official product, but for battery packs they're fine. Official play and charge kits generally start around £13, so this is a no-brainer really.